1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06e79d489594b8e6ab1c1b3a3bc483a55402610aaf6d0937ea434697fa12b22. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a42ac39a-e34c-4bac-bc47-7dad0ad3c711.json and https://artists.proofprofile.net/proofs/artist/a42ac39a-e34c-4bac-bc47-7dad0ad3c711.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Massachusetts - 20 Golden Hits of the Bee Gees
The Cheeky Song (Touch My Bum) - Sexy Dance Hits
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c3d9db4cc7c585ad338c77f75392d9d4e0a92d2e6a52a2e552135917faca1f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USKYW1229869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef92a11346ca64ce0660d96370c03a22f7ad3b8449269b54ca28c7f48e4914b7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:47:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USKYW1334657.
Millennium Megamix - 50 Non Stop Party Favourites
Masters of Metal - 18 Heavy Metal Greats
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46712a957ec18a578decf7bb828fbee77e6cc1ed7fa31f59955c3a32d4ab4a5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUV401438497.
Yellow Submarine - 16 Hits of The Beatles
Masters щf Metal - 18 Heavy Metal Greats
Messe à trois voix, Op. 12: Panis Angelicus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1483573d4723c78889b08d5acdb377909a1ef11fc0d02241a8c37a6d3552914c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHMU1400137.